diff --git a/vlsisapd/src/CMakeLists.txt b/vlsisapd/src/CMakeLists.txt
index 543fbd81..549fe170 100644
--- a/vlsisapd/src/CMakeLists.txt
+++ b/vlsisapd/src/CMakeLists.txt
@@ -1,8 +1,8 @@
 ADD_SUBDIRECTORY(agds)
 ADD_SUBDIRECTORY(cif)
-IF(IS_DIRECTORY openChams)
+IF(IS_DIRECTORY ${VLSISAPD_SOURCE_DIR}/src/openChams)
   ADD_SUBDIRECTORY(openChams)
-ENDIF(IS_DIRECTORY openChams)
-IF(IS_DIRECTORY dtr)
+ENDIF(IS_DIRECTORY ${VLSISAPD_SOURCE_DIR}/src/openChams)
+IF(IS_DIRECTORY ${VLSISAPD_SOURCE_DIR}/src/dtr)
   ADD_SUBDIRECTORY(dtr)
-ENDIF(IS_DIRECTORY dtr)
+ENDIF(IS_DIRECTORY ${VLSISAPD_SOURCE_DIR}/src/dtr)